Impedance sensor of split phase ratio of two phase flows, and method for optimizing structural parameter

Abstract

An impedance transducer of mobile phase content in two-phase is prepared for applying metal shielding layer as external layer for enabling to regulate thickness to support structure, applying insulation material layer as intermediate layer for isolating excitation electrode and measurement electrode from metal shielding layer, applying insulation pipe layer with excitation electrode and measurement electrode as internal layer and setting two said electrodes on pipe wall of insulation pipe layer radially and symmetrically in mode of 180degree -angle spiral distribution. The method for optimizing structure parameter of said transducer is also disclosed.

Description

technical field [0001] The invention relates to a detection device and its application, in particular to a two-phase flow split-phase holdup impedance sensor and an optimization method for its structural parameters. Background technique [0002] Phase holdup is an important parameter for online real-time measurement of two-phase flow, which is of great significance in industrial production and oil transportation. [0003] There are many methods for measuring phase concentration, such as electrical method (such as patent: JP2007033062-A, Impedance type practical electric void fraction meter for measuring water flow trial, measures average void fraction of two phases of flow of water in instant, without being based on water quality, usingrod-shaped assembly), acoustic method (GB2120791, Microwave gas-liquid voidfraction meter), optical method (such as patent: JP9257704, Void Meter), ray method (JP57175247, Radiation void factor meter, US4282435, Mono-energetic neutron void met...

AI Technical Summary

Problems solved by technology

[0005] For sensors using the conductometric method, the electrodes are generally in contact with the measured substance. When the research object has a lot of non-conductive substances, the measurement electrodes are in contact with the non-conductive substances, causing the measurement electrodes to float, which easily leads to saturation of the resistance / conductance measurement circuit. , limiting its measurement range and accuracy

[0006] For sensors using the capacitance method, the electrode distribution is mostly parallel to the longitudinal axis of the sensor, and the uniformity of the sensitive field corresponding to the measurement area is poor, and only a single mode is measured, mostly for gas-solid two-phase flow, not involving many Measurement of Conductive Substance Fluids

Images